Eight coherent channels.Zero integration project.
A wideband coherent receiver where phase alignment is a property of the hardware — not a months-long systems project.
Target specifications
Design targets for the production unit — measured performance, with methodology, publishes when hardware ships.
- Channels
- 8 coherent RX
- Instantaneous BW
- 100 MHz per channel
- Resolution
- 14-bit
- Frequency range
- 300 MHz – 6 GHz · bypass path below
- Backhaul
- 40GbE QSFP+ · 1GbE management
- Coherence
- Shared LO · auto re-cal on retune
- Multi-board
- REF / LO / PPS chaining — to 32 channels
- Timing
- OCXO · ext 10 MHz · 1PPS · VITA 49.2
The layout is the datasheet
Everything the spec promises is visible in copper. Eight identical RF lanes across the front. One LO tree in the middle — that is the coherence. Four quad ADCs and the K26 module behind it, and a 40GbE cage on the way out.
Rev 0.4 prototype layout — rendering, not a photograph
- Shared-LO backbone — one synthesizer, eight demodulators
- Cal injection network — matched-length, pre-LNA
- RF slices — SMA to zero-IF, one shielded lane per channel
- Compute — Kria K26, quad ADC row, 40GbE out
Aligned at the connector, not in your codebase
Every channel sees the same local oscillator through a matched distribution tree, and a built-in pilot keeps the array aligned through retunes and temperature. What reaches your software is eight rows of samples that already agree.
And it scales by cable
Multi-box phase coherence is normally where coherent-array budgets go to die. ApexSDR carries reference, LO, and PPS in and out natively: chain boards with SMA jumpers and the stack behaves as one instrument. Thirty-two coherent channels is a parts order, not a program.
Ships with Apexia Fabric
Every unit includes Apexia Fabric — the software stack that turns aligned samples into working instruments. Ready-to-run reference designs for direction finding, TDOA, and spectrum monitoring; live debug and visualization; and a C API for building your own processing. No Vivado, no VHDL — aligned samples in minutes, not weeks.
Fabric is built by the same bench that ships our DSP cores — the pipelines are the product, not a demo.
Explore Apexia Fabric — free beta available nowBuilt for
First units go to founding instruments
Research groups and teams who want eval hardware with white-glove bring-up from the engineers who built it. Join the list, or if you're building an instrument now, talk to us directly.
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